Please note that Repair IMEI / Unlock procedures won't work for phones which were manufactured after 12W10 (12W11, 12W12, 12W13 and later) (phones with so-called new security).

You can find phone's production date on the sticker under the battery:

Following phones can be unlocked with S1 server only:

Platform: OMAP3430

SatioTM U1

VivazTM U5

VivazTM pro U8

* Developer provides support only for those phones which are on the list of supported. Not all servicing features can be applied to some supported models, due to difference of hardware / software versions. Complete list of supported models you can find on the official product page, or on the GSM forum.